First, do a good job of product market research is the basis for equipment selection
Corrugated carton products are a type of products that are large in and large out. Considering the increase in shipping costs and the timeliness of delivery, the market area of such products is doomed to not cover too much. The market scope is usually locked within 200 kilometers. Therefore, the decision-makers must conduct surveys and investigations on the major specifications and defects of major potential customers' products, and be aware of them, so as to provide the basis for the next decision.
In addition, we must also understand the equipment status, management status, and customer status of the surrounding competitors so as to provide the basis for the next step in the development of marketing measures.
Second, consider the overall coordination of the corrugated board production line
For the medium and high-speed corrugated paperboard production line, the matching principle is to take into account the level of automation of each single machine, and more attention should be paid to the overall matching and coordination of the corrugated board production line. Since the high-speed production line is chosen, the entire line with a high degree of automation should be selected to match the configuration.
For example, it needs to be equipped with an automatic splicer (according to the entire line speed, a splicer that selects the proper speed, the number of which is determined according to its own economic situation), and a positive-pressure card singe-type single-faced corrugating machine (with convenient roll change, smooth operation, and speed (Fast), production management system, internal expansion chuck (for safety needs to select more brakes), automatic thin knife slitter (in order to facilitate a quick change, need to be equipped with 2), slitting machine Equipped with three kinds of pressure wheel (convex concave, convex concave, convex flat), spiral cross cutting machine, automatic glue system, coating machine (pressure regulating pressure bar instead of pressure roller), double The number of hotplates on the surface must be matched with the speed (spring-type hot platens for the drying section, of course, the quality of the condensate traps must be considered).
Third, focus on selecting the key components of the key
Several important technical points of corrugating roller
For high-speed machines, the diameter of a single-sided machine is usually not less than 320mm, otherwise speed is difficult to mention. In general, the corrugating roller diameter is selected to be 375mm or more.
Nowadays, the most commonly used single-sided machines on the market are mostly unshielded fork vacuum suction single-sided machines or positive pressure card-type single-sided machines. In actual operation, it is necessary to control the matching pressure (with clearance) and parallel of the corrugating roller. Degrees, the temperature of the surface, and the choice of the appropriate height.
Of course, the control of the temperature of the corrugating roller surface (usually 160-180° C.) is closely related to the saturated vapor pressure and the discharge of condensed water. We know that after saturated steam passes through the corrugating roll, it releases latent heat and condenses into condensed water. Since the thermal conductivity of condensed water is low, if it is not collected smoothly and accumulates in the roll, it will greatly increase the thermal resistance of the roll and cause roll The surface temperature of the drum drops and it cannot work at normal speed.
When the condensed water in the roller accumulates to a certain extent, the outlet of the drain pipe is blocked. Since the saturated vapor pressure in the roller is greater than the pressure at the drain pipe end, the pressure difference at both ends continuously discharges the condensed water, so the condensed water discharge pipe The port must be mounted downwards and the end should be as close as possible to the inner wall of the lower part of the roller body in order to maximally eliminate condensation. Of course, the nozzle cannot contact the inner wall, because the roller is rotating, and the condensate drain pipe and the steam rotary joint are fixed, otherwise noise may occur and the drain pipe may be damaged. The fixed suction tube is usually made at an angle of 45° to the bottom surface.
Because the corrugating roller is in the meshing process, pressurizing both ends of the upper corrugating roller will cause it to have a certain deflection, so that the gap in the middle part of the corrugating roller will increase. For this reason, the center diameter of the corrugating roller must be slightly larger than the two ends when it is manufactured. This difference is medium high. According to the industry standard QB/T2498--2000 “Corrugated Cardboard Production Line”, the high corrugating roll height on the machine is usually 4 times the roll deflection.
